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← Logic & PuzzlesAn optical fiber is stretched gradually; which consequence regarding signal integrity follows from this deformation?
A)Signal gain increases exponentially
B)Dispersion effects are entirely eliminated
C)Refractive index becomes perfectly uniform
D)Bit error rate remains invariant✓
💡 Explanation
The bit error rate remains invariant because continuous deformation (stretching) represents a homeomorphism (topological equivalence), preserving the fundamental properties of the signal's topological space; therefore, the fiber's functionality is maintained rather than disrupted unless physical limits are reached.
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